Just picked mine up from the dealer and it had a quarter gallon in it. I stopped to fill up and took the cap off but did not really look at it before hand, so when I tried to put it back on I had a seriously hard time with it. I put it back on and the rubber ring presses up against the filler hole, but the rest of the cap is about an inch above that. Is that right? It went on fine like the but then the key was stuck and would not come out. I had to wrestle the cap off, bang it on the ground a couple times and then the key came free.
Went back on the same way and key came out fine but it sure looks weird to me.